Rough-legged Falcon

Of our soaring Buteo hawks, this is the only one tied to cold climates. It nests in the Arctic, mostly in tundra regions north of the boreal forest; in winter, only a few move farther south than the central United States. Its breeding success on the tundra is often dictated by the population cycles of lemmings, which may provide most of the food for the young. The name 'Rough-legged' refers to the feathering that extends down the legs to the base of the toes -- a helpful adaptation for staying warm in frigid weather.